Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'bc90bf12bc7e57ab434edc2e240495d4ed20bb68950f014a532ccf3e01894077' 
  AND token = 'aYBoBBU7wY3yCZuXu41qbuyMCgq1BHobOsTwOSoQgQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}